Sirko, A.H., Dzyak, L.A. and Chekha, E.V. 2020. Coexistence of multiple sclerosis and brain tumors: a literature review. Medicni perspektivi. 25, 2 (Jul. 2020), 30–36. DOI:https://doi.org/10.26641/2307-0404.2020.2.206348.